—I hear you run for half an hour every day. —Right, we have to. It is one of the ______ in our school.

My father works in a ________．His students like him very much．

“Tommy, run! Be quick! The house is on fire!” the mother shouted, with      clearly in her voice.

Mr White, the principal, has made a great _________ to the growth of the school.

---You are so happy. What’s the _______?---I’ve got a new bike from my mother.